The correct answer is A.
<em>The Northern Securities Company</em> was formed in the year 1901 in the state of New Jersey. It was the merging of holdings of the following railroad companies: Northern Pacific Railway, Great Northern Railway, Chicago, Burlington and Quincy Railroad.
<em>This merger created a monopoly that monopolized the railway traffic between Chicago and the Northwest.</em>
President Roosevelt, fearing restraint of trade and competition, sued the company in 1902 under the Sherman Antitrust Act ( this acts regulated the competition among enterprises).
The government won the case and the company was dissolved. The three railroad companies started to operate individually again.
One factor was barbed wire. As farmers and ranchers wisened up, they used the wire to fence in their cattle, destroying the use of cowboys, and taking away one aspect of the "wide open west".
Herds of cattle took over the plains and destroyed the grass. In 1883 t big drought struck and water streams dried up and prairie fires grazed. Also the barbed wire and the natural disasters. People wanted to be able to mark their property.